If the piano player was Daniel, the 7th, and was Starbucks dad there are some interesting pieces of info related to that.
Remember when the Simon doctor pointed out to Starbuck that all the fingers in her hands had been broken when she was a child? He called it child abuse. I also seem to recall a scene where we do see its Starbucks mom who does it. Maybe the mom did it out of resentment for Daniel leaving, or to prevent Starbuck from becoming a piano player.
As to Boomer, and the eights in general, if Cavil killed the template for the sevens he may have had a hand in then building the eights. Which is why they are so erratic. Or he may even have slipped in a little programming to make them susceptible to his will. So Boomer is actually under orders?
On the other hand, when Boomer hears she is going to be killed by the rebels, she may feel that she has to return to the Cylons and because she helped Ellen she needs something to win back their good graces, so thats why she took Hera.
Did anyone recognize the tattoo on Starbucks back, when she was in the shower? I don't recall seeing that one before, it looked sort of like a house or a temple. It was made of squares and had more on the base, dimininishing to one on top, and something sticking out of the top square. Anyone know what it is?
Is Galactica really going to bite the dust? If some power could build a brand new viper in a short time for Starbuck, could that power also build a new Galactica?
Ed Olmos has hinted the series will end very darkly. So for now I am guessing that the humans and cylons have failed in this cycle to achieve whatever they needed to "earn" redemption. So they will be doomed to repeat the cycle.